1 Departments of Medicine and Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
2 Center for Health Equity Research and Promotion, VA Pittsburgh Healthcare Center, Pittsburgh, Pennsylvania, USA.
3 School of Nursing, Oregon Health and Science University, Portland, Oregon, USA.
4 Division of Digestive Diseases, David Geffen School of Medicine at University of California, Los Angeles, California, USA.
5 Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine at University of California, Los Angeles, California, USA.
6 Liver Center, Division of Gastroenterology, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.
7 Department of Medicine, Einstein Healthcare Network, Philadelphia, Pennsylvania, USA.
8 Brookdale Department of Geriatrics and Palliative Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
9 Geriatric Research, Education and Clinical Center, James J. Peters Veterans Affairs Medical Center, Bronx, New York, USA.
10 Sections of Gastroenterology and Hepatology and Health Services Research, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA.
11 VA HSR&D Center for Innovations in Quality, Effectiveness, and Safety (IQuESt) and Michael E. DeBakey Veterans Affairs Medical Center, Houston, Texas, USA.